Toto slow close not so slow anymore

Hello
I have Toto toilets with slow close seats. One is closing faster than it was originally. Not crashing - I do that when I forget on a toilet without the slow close feature - but the seat drops much faster than before. Is there any adjustment available ? Thanks

Thanks for the replies even if they mean a new seat is required - at least I know. My seat free-falls pretty much but catches enough in the last couple of inches to avoid crashes. BTW, what DO you call it when a Toto owner lets a wood seat crash into and break a normal base?? (I have no answer here, but this will happen to me at some point). Richard

We have a different problem with our soft close Toto seat. Sometimes when you put it in the up position it starts to lower itself automatically a second or two after raising it. Makes for some interesting juggling if it happens when you don't expect it. I assume there is no adjustment for this either.

If the floor isn't level or the tank is not secured well, it can tip so the seat can't go back far enough so it is vertical...that can just let gravity do it's thing. A "normal" toilet seat would do the same thing, except it would do it with a bang instead.

The problem is with the seat, not the install. Measured it - when up the seat sits 5 degrees past vertical. In my case with a normal seat gravity would continue to push the seat back against the tank; it would not come crashing down. There is some issue here with the Toto seat spring return or whatever mechanism they use to make it soft land.

I've had a Toto & a Kohler softclose for 2 and 1 years respectively. The Kohler was a lemon and I exchanged it for another one
I get the feeling that if these seats get forced and/or handled roughly then the chances of them failing increases.